Amazon has put up a listing for the Berserk: The Complete Series Blu-Ray, revealing a release date. According to the product page, the bundle will be coming out on June 11, 2019, in the U.S. region. If you are interested, you can pre-order the Complete Series Blu-Ray of Berserk with this link from the online retailer; furthermore, you can also check out what thte packaging looks like with the image placed just below this paragraph.
You can also take a look at Amazon’s list of special features for the bundle below:

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